Every Marvin Window and Door is made to order, one at a time. An unparalleled value in the market, Marvin offers craftsman-quality construction, energy-efficient technology and the industry’s most extensive selection of shapes, styles, sizes and options.

Integrity's windows and doors are made with Ultrex® Fiberglass, an innovative material created 20 years ago. For two decades now, Ultrex has outlasted and outperformed the competition on virtually every measurable scale.

Infinity Ultrex fiberglass replacement windows and patio doors are designed to replicate the look of traditional wood windows while providing modern features and low-maintenance, yet long-lasting performance.

When you partner with Marvin on your next project—whether that be a remodel, replacement, new construction, or even the creation of sustainable building—you can be sure you will be getting the guidance and expertise necessary to make any design complete. Tell us a few things about your project, and Marvin will work with local dealers to bring your ideas to life.

We gathered some helpful resources to help answer your immediate questions and provide solutions. From manuals to maintenance, and installation instructions to energy data, there’s a wealth of information right here.

Need Some Extra Help?

We gathered some helpful resources to help answer your immediate questions and provide solutions. From manuals to maintenance, and installation instructions to energy data, there’s a wealth of information right here.

MarvinNext GenerationUltimate Double Hung

The Marvin Next Generation Ultimate Double Hung window is a classic reinvented. With its innovative keeperless hardware system, multipoint locking system, lockable vent mode and other performance and aesthetic-enhancing improvements, this window seamlessly combines state-of-the-art technology with Marvin’s legendary craftsmanship without sacrificing the traditional double hung look. The large variety of available sizes and the unmatched performance is what sets this double hung apart from the rest.

Energy Information Finder

This tool provides some of the most common options on windows and doors and related NFRC values. For more information about the energy efficiency of specific products and options, please contact your local Marvin sales representative.

The National Fenestration Rating Council (NFRC) has developed and operates a uniform national rating system for the energy performance of fenestration products, including windows and doors. For additional information regarding this rating system, see www.nfrc.org/WindowRatings.